With the push down the covid-vaccine-timeline and knowledge on the most notorious side-effect, Heart inflammations, what can individuals do to increase overall heart health?
If someone happens to have the intel, I'm quite interested in what happens if you contract COVID and/or the vaccine multiple times (is the heart more prone to failure by multiple inflammation, so to speak)

Any recommendations on
A.) papers
B.) significant measurements to watch, such as pulse & blood pressure
C.) general info such as diet, exersice
.. are highly appreciated.